Right now I'm a level 2 Bard (that can go to level 3) and I've noticed that Rangers can learn Summon Nature's Ally I - IV. I really love summoning/pets and I was wondering if there is a way for me to use Bard songs along with some Bard Spells and the Ranger spells Summon Nature's Ally. Will I need to start over or can I do it with this character? How exactly do I do this?

Thanks!